﻿GUDE 
  : 
  FOUE, 
  UNDESCRIBED 
  HELICOIDS 
  FROM 
  BORNEO 
  AND 
  GUAM. 
  317 
  

  

  Endodonta 
  (Thaumatodon) 
  tomlini, 
  n.sp. 
  

   Shell 
  widely 
  unibilicated, 
  lenticular, 
  dark 
  brown, 
  strongly 
  and 
  

   closely 
  ribbed 
  ; 
  apex 
  slightly 
  sunken, 
  suture 
  rather 
  shallow 
  ; 
  

   whorls 
  4, 
  increasing 
  slowly 
  at 
  first, 
  the 
  last 
  two 
  rather 
  suddenly, 
  

   widened 
  towards 
  the 
  mouth, 
  slightly 
  flattened 
  above, 
  rounded 
  at 
  the 
  

   periphery 
  and 
  below 
  ; 
  aperture 
  oblique 
  rotundate-lunate, 
  with 
  two 
  

   raised 
  revolving 
  lamellae 
  on 
  the 
  columellar 
  wall 
  and 
  four 
  teeth 
  on 
  the 
  

   outer 
  wall, 
  the 
  upper 
  one 
  smaller 
  than 
  the 
  other 
  three 
  ; 
  margins 
  

   acute, 
  the 
  upper 
  curving 
  forward, 
  columellar 
  not 
  reflected. 
  

  

  Endodonta 
  (Thaumatodon) 
  tomlini, 
  n.sp. 
  

   Scale 
  line 
  = 
  2 
  mm. 
  

  

  Diam. 
  niaj. 
  3"25, 
  min. 
  3, 
  alt. 
  l'25mm. 
  

  

  Hah. 
  — 
  Guam, 
  Ladrones. 
  Type 
  in 
  Mr. 
  Tomlin's 
  collection. 
  

  

  I 
  have 
  much 
  pleasure 
  in 
  associating 
  with 
  this 
  new 
  species 
  the 
  

   name 
  of 
  our 
  President. 
  It 
  is 
  allied 
  to 
  E. 
  heptaptychia, 
  Q. 
  & 
  M.,^ 
  

   but 
  that 
  species 
  is 
  maculated 
  and 
  has 
  five 
  teeth 
  on 
  the 
  outer 
  wall. 
  

  

  1 
  Quadras 
  & 
  Mollendorff, 
  Nachr. 
  Blatt 
  Deutsch. 
  Malak. 
  Gesells., 
  1894, 
  p. 
  15. 
  

  

  